Side skirt of a vehicle



FIG. 1 is a side perspective view looking from the front of a side skirt of a vehicle showing my new design; and,

FIG. 2 is a side perspective view looking from the rear of a decorative design for a side skirt showing my new design.

The rear view of the surface that faces the automobile when installed is omitted and is not part of the claimed design.

The broken line showing of the automobile is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

The ornamental design for a side skirt of a vehicle, as shown and described. 